EPC 100 Conventional Control

• An all electronic control system that can control two compressors or one compressor and one unloader.

EPC100 Product Page

Condenser Control

The EPC-100 can operate a remote condenser with up to seven independent fan banks and one split condenser valve. The EPC-100 can monitor the head pressure and a liquid drop leg temperature.

• Sequential Staging--The EPC-100 will sequentially stage the fan banks in the FILO format (first on last off). The fan bank closest to the condenser input manifold should always be assigned as the first, or primary, fan bank. The EPC will keep the first fan bank running nearly constantly to prevent expansion and contraction at the pipe and tube sheet joints.

• Fan Bank Control--The EPC-100 will operate the condenser fans based upon one of three methods.

Fixed Head Pressure Control--The EPC-100 can stage the condenser fan banks based upon a fixed head pressure setpoint.

Floating Head Pressure Control--The EPC-100 can stage the condenser fan banks based upon the temperature of the liquid drop leg temperature. The EPC-100 will maintain the liquid at the Ambient Sub Cooled Refrigerant Setpoint.       

Fan On When Compressor Active -- The EPC-100 can be setup to only run the condenser fans when the compressor is running.

• Parallel Mechanical Backups--Backup pressure controllers or thermostats are wired in parallel with the EPC Condenser Control Relays with their power supply circuitry wired through the Condenser Switchback Relay. If the EPC were to fail, the Condenser Switchback Relay will de-energize, supplying power to the backup controls. The backup controls may be set as closely to the Head Pressure Setpoint as possible.